Electrical condenser



Aug. 21, 1928.

1,681,884 W. H. GOODMAN ELECTRICAL CONDENSER Filed Feb. 12, 1923 v e 3 i L (L M:

INVENTOR 11 472 i 47 77 Hear 6000 2170 1;;

ATTORNEY elements Patented Aug. 21, 1928.

UNITED STATES PATENT OFFICE.

nunrnmn CONDENSER CORPORATION, or

DELAWARE NEW YORK, N. Y., A. CORPORATION OF ELECTRICAL CONDENSER.

Application filed February 12, 1923, Serial No. 618,695, and in Great Britain March 22, 1922.

This invention relates to electrical condensers and is particularly applicable to high potential condensers comprising a caslng having condenser surface elements connected together series and disposed, in a plurality of sets connected in parallel, the arrangement being such that the high potential elements of each set are located in a central portion of the casing and the low potential positioned adjacent a wall of the casing.

The object of the invention is to provide an improved condenser including the construction thereof and the arrangement of the condenser elements.

The invention enables condensers to be manufactured of large capacity which occupy comparativel small'space, and further, condensers of very high voltage and for carrying large high frequency currents ma be efficiently constructed.

he invention comprises condenser plates or units grouped in appropriate sets which are diposed substantially radially around a centre or axis. According to the invention a plurality of groups of radially arranged sets of condenser lates or units may be embodied together in spaced relationship or disposed coaxially.

The invention also consists 1n a means of mounting condenser plates comprislng a central abutment element, an annular abutmentelement and means whereby pressure can be brought to bear upon the condenser plates between the two abutment elements to rigidly clamp the plates together in block form.

Further features of the invention will hereinafter appear and be delimited by the claims.

In the accompanying drawings Figure 1 is a fragmentary sectional elevation of an electrical condenser according to one form of the invention, and

Figure 2 is a sectional plan of the condenser according to Figure 1.

In carrying the invention into effect according to one convenient mode, as applied to a condenser having characteristics of the kind above specified, a suitable casing a, preferably of cylindrical shape, is provided.

In the present instance it is preferred to,

arrange this casing so that it may stand vertically but it is to be understood that the invention may be applied to a horizontally lying casing or box.

The upper end closureor lid a of the casing a is provided with a series (for example, four) of elements, rods or posts I) adapted to extend substantially to the lower end of the casing. These rods are adapted to act as conductors or terminals (low potential) in parallel, for the electric circui and upon these rods is mounted aplurality of metal annular abutment elements or ring members c of less circumference than that of the casing a and arranged coaxially and spaced apart. The annular elements may be secured to or mounted upon the rods b by any sultable means; for example, the rods may be cut away, as at b, to provide shoulders for the reception of the annular element whereby the rods act as distance pieces in addltlon to supporting the elements.

Around the axis of the casing a metal'sup-- port and conductor 03 preferably of tubular form 1s located and secured in the end closure or top a of the casing a. This central metal conductor is adapted to constitute the high potential terminal of the condenser and the upper end thereof is enclosed by a downwardly depending sleeve 03' of insulating materla'l. The connectionof the tubular conductor with the end closure is suitably insulated therefrom, so that by means of this insulation and the insulation sleeve the high potential termlnal is isolated from the easlng walls at the part where it might be otherwise in dangerous proximity thereto.

S1m1larly, the lead and the high potential terminal exterior to the casing may be pro- \vided with suitable insulation which may be in the form of a sleeve or like member 05 extending away from or upwardly of the top ,or lid a. I

In the plane of each of the annular elements is a ring or collar or equivalent de- Vice 0' adapted to serve as a central abutment for the condenser plates, mounted upon the tubular conductor 03 and in electrical connection therewith. The outer surfaces of these collars are preferably formed of polygonal form, for example, in the present case it is preferred that the collars should in plan be octagonal (see Figure 2). Radially opposite the octagonal facets thus provided and upon the inner periphery of the annular element or device 0 thickened portions 0 may be formed so that a face is presented towards the axis of the casing which is more or lessparallel 'with a facet on the octagonal collar 0.

In lieu of providing a cdllar such as p, an independent block may be provided in associationwith each set'ofcondenser units. These blocks are on the one hand bedded against the adjacent condenser units and on the other hand seated upon the conductor (Z for which purpose the blocks may be providcd with a correspondingly arcuate face, the pressure under' which the condenser units are clamped together being suflicient to maintain these blocks in position.

Between these faces upon the annular member and the facets on the collar or equivalent element carried by the conductor (Z, con; denser plates 6 are adapted to be mounted. It is preferred to assemble the condenser plates to form a block and support the set thus formed between the abutment collar 0 and the abutmentannulus 0, so that each set of condenser elements is radially arranged round the axial conductor. The radial con-- denser sets may each comprise a plurality of condenser units, the metallic plates of which are united in parallel, the units of each set being connected together in series or in parallel according to the nature of the condenser being constructed. The condenser units are diagrammatically indicated in connection with one set shown on the left of Figure 2. I

The condenser plates may be of any suitable shape, for example, they may be circular. rectangular or polygonal.

It will be observed that the condenser surface elements lieparallel with the facets of the octagonal collar 0 or as tangents to circles having their centres upon the axis of the conductor (2; that is, the plates e face towards the central axis of the condenser, and the clamping devices comprising the central abutment c-and theannular element 0, exert pressure upon each set of plates or unit in a substantially radial direction to secure the units together adjacent the axis by holding them tightly against the collar 0.

Any suitable means may be employed for mounting the condenser sets in position between th annuli and the collars. For instance, a condenser set may be conveniently clamped by a set screw a mounted in the annular element 0 and arranged coaxial with the centre line passing through a set of elements c. This set screw is adapted to bear upon a suitable end piece arranged at the outer end of each set or block of condenser units. By reasoh of the annular formation of the element 0 very great pressure may be brought to bear upon the condenser plates,

such that when clamped up theyvirtually connected together in parallel to the casing terminals, on the one hand by the depending posts or rods 7) and on the other hand by the central conductor (Z.

By the above described arrangement it will be, observed that the condenser units of low potential lie adjacent-the annuli 0 or casing a while the high potential units lie adjacent the central conductor d or axis of the casing.

Instead of making the various members supporting the condenser sets of metal, other material, for example insulating or insulated material, may be employed providing the necessary leads and connections are providcd appropriately to connect the sets of elements in parallel.

As an alternative to providing separate annuli carried by rods or posts, similar elements may be mounted upon or incorporated in a frame, either suspended within thecasing or carried from the lower end, or the casing itself may be employed to serve the double purpose of enclosing the condenser and. supporting radially, arranged sets of condenser units. For this purpose the casing may be suitably shaped internally to provide a seating or mounting for the sets of units. If necessary, suitable insulation covering may be provided upon the exterior of the casing.

In carrying the invention into effect according to another convenient mode, the support at the outer extremity of the condenser sets, such as provided by the annular element-sorframework, may be dispensed with and a rod or post mounted at right angles to the axis of the condenser may be caused to pass centrally through the condenser plates and engage by screw threaded or other suitable means a head piece, so that pressure may be brought to bear to hold the plates or units together in the block form upon the post. Instead pof providing a single post arranged radially, a plurality of posts may be employed extending from a central collar or other support and disposed parallel to a radial line passing through the centre of the condenser plates.

According to a modification, instead of arranging for the output or return from the condenser to take place from the same end thereof as the input, the output may be effected from the bottom of the condenser input with a view to equalizing the current distribution. For this purpose the rods or equivalent members 6' may-be extended beneath the condenser sets inwardly to a central point to which the output lead may be connected.

Although the present invention has been described mainly with reference to a condenser in which the units are arranged according to their potentials, the invention may be applied to other types of condensers wherein t e radial arrangement of sets may be adopted with benefit.

Having now described my invention, what I claim as new and desire to secure by Lette'rs Patent is 1. An electrical condenser comprising a series of sets of plates or units arranged substantially radially about an axis, the series of sets being coaxially disposed and spaced apart along said axis, and devices acting in a substantially radial direction for clamping said sets together at said axis.

2. An electrical condenser comp-rising a central support, condenser plates grouped to form units in substantially radial arrangement about said support as an axis, said plates facing said support, and additional condenser plates spaced from the firstnamed plates along said support, and likewise grouped to form units in substantially radial arran ement about said support as an axis and, avingtheir plates facing said support.

3. An electrical condenser comprising a central support, condenser plates grouped to form units arranged about said support as an axis, additional condenser plates spaced from the first plates along said support and grouped to form units arranged about said support as an axis, and clamping devices acting in substantially radial direction to secure said plates against said support.

4. An electrical condenser comprising a central support, condenser plates grouped to form units arranged about said support as a central axis, said plates facing said support, additional condenser plates spaced from the first-named plates along said axis and likewise arranged about said support as an axis, and facing said support, and j clam in' devices acting in substantially radia direction to secure all of said units in position.

5. An electrical condenser comprising a casing, a central support and conductor in' said casing, an abutment upon said support, condenser plates grouped to form units in substantially radial arrangement about said support as an axis, said units engaging the abutment at one end, an annular member surrounding said units to enable them to be engaged at their opposite ends and held in position with reference to said support, and one or more rods forming terminals or conductors for the opposite ends of said units.

6. An electrical condenser comprising a central support, condenser'plates grouped to form units in substantially radial arrange.

ment about said support as an axis, additional condenser plates spaced from the first named plates along said support, and likewise grouped to form units in substantially radial arrangement about said support as an axis, clamping devices encircling each group of said units, and a plurality of rods oined to said clamping devices to connect same and said umts.

- In testimony whereof I have signed my name to this s ecification.

' WILLI HENRY GOODMAN. 

